On 15 May, 2006, double amputee Mark Inglis reached the summit of Mt Everest. It was a remarkable achievement and Inglis was feted by press and public alike. But only a few days later he was plunged into a storm of controversy when it was learned that he had passed an incapacitated climber, Englishman David Sharp, leaving him to a lonely end high in the Death Zone.

In this documentary, Bear Grylls takes us on a journey through the most extreme version of the world's highest and most legendary peak: Mount Everest. Several leading figures in mountaineering and extreme sports, for whom a standard ascent is no longer enough, transform Everest into a laboratory for extreme challenges. Told through archival footage and reenactments, this elite group seeks new forms of performance, attempting to ski the slopes, snowboard down them, hang-glide or paraglide above the summit ridge, open new routes on more technical and exposed faces, and break climbing records. The documentary also highlights the essential role of the Sherpas, the colossal logistics behind each attempt, the explosion of commercial expeditions, and the moral debate surrounding the ever-increasing risks involved in breaking records or achieving unprecedented feats.